Isamu is a distinctive boys' name in United States, ranking #11053 in 2000 with 5 recorded births. This places Isamu in the bottom 9% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2009 with 8 births ranking #9307. In 2000, approximately 1 in every 392,786 boys born was named Isamu. STABLE Recent data shows the name is currently stable.